Knowing how to pivot is important in OSINT it seems and to go from a wide scope to a narrower scope. Pivot charts are useful to collect information of results from selectors, each pivot being a resultant node of information. Going from a wide search to a narrower search is like the goldilock's effect, a little too wide and you lose focus but too focused you can lose out on other wider details. All sources state that methdology trumps tools and the focus early on in an OSINT career is to develop your methodology like knowing how to pivot and knowing the intelligence cycle. Being nimble and flexible in your search queries is important to hone your searches using Google as a primary tool to locate information. You just have to Google it. You Google to find tools like websites that facilitate investigations. It seems that Rae Baker, the author of Deep Dive into OSINT, is adept at using Google to serve her needs though she stresses the importance of methodology. Cynthia Hetherington of Hetherington Group states much the same with regards to the importance of methodology in an investigation. Except she has her own intelligence cycle with an acronym called "CRAWL". It stands for Communicate Research Analyze Write and Listen. The gist is essentially the same but stresses the client's needs, them being stakeholders. Google Dorks are key in a search. https://www.exploit-db.com/google-hacking-database shows all the various possibilities of what you could search for online and all the Google Dorks in action. You can find pretty sensitive data online so be careful.